Re: Nasty bug?

[Paul Furness <paul.furness@vil.ite.mee.com>]

I tried some more things:

I created a load of 1G lv's and did mkfs -t xfs on each one in turn.

First few were fine, then the same problem came back again. Here's the
tail of the syslog that's relevant:

Aug  1 17:02:00 picard modprobe: modprobe: Can't locate module
block-major-43
Aug  1 17:02:00 picard last message repeated 31 times
Aug  1 17:02:00 picard kernel:  I/O error: dev 08:00, sector 2789278336
Aug  1 17:02:19 picard kernel:  I/O error: dev 08:00, sector 2784559747
Aug  1 17:02:19 picard kernel:  I/O error: dev 08:00, sector 2784821891
Aug  1 17:02:19 picard kernel:  I/O error: dev 08:00, sector 2784821891
Aug  1 17:02:19 picard kernel:  I/O error: dev 08:00, sector 2785083904
Aug  1 17:02:19 picard kernel:  I/O error: dev 08:00, sector 2784559744
Aug  1 17:02:19 picard kernel:  I/O error: dev 08:00, sector 2784559752
Aug  1 17:02:19 picard kernel:  Aug  1 17:05:11 picard kernel:  I/O
error: dev 08:00, sector 2785870467
Aug  1 17:05:11 picard kernel:  I/O error: dev 08:00, sector 2786132611
Aug  1 17:05:11 picard kernel:  I/O error: dev 08:00, sector 2786394755
Aug  1 17:05:11 picard kernel:  I/O error: dev 08:00, sector 2786656899
Aug  1 17:05:11 picard kernel:  I/O error: dev 08:00, sector 2786919043
Aug  1 17:05:11 picard kernel:  I/O error: dev 08:00, sector 2786919043
Aug  1 17:05:12 picard kernel:  I/O error: dev 08:00, sector 2785084032
Aug  1 17:05:12 picard kernel:  I/O error: dev 08:00, sector 2786132640
Aug  1 17:05:12 picard kernel:  I/O error: dev 08:00, sector 2786133664
Aug  1 17:05:12 picard kernel:  I/O error: dev 08:00, sector 2786134688
Aug  1 17:05:12 picard kernel:  I/O error: dev 08:00, sector 2786135712
Aug  1 17:05:12 picard kernel:  I/O error: dev 08:00, sector 2786137760

I/O error: dev 08:00, sector 2784821888
Aug  1 17:02:19 picard kernel:  I/O error: dev 08:00, sector 2784821896


Then, when I tried with any of the lv's created after that one, I get a
load of the same error:

Aug  1 17:05:11 picard kernel:  I/O error: dev 08:00, sector 2785084032
Aug  1 17:05:11 picard kernel:  I/O error: dev 08:00, sector 2785084032
Aug  1 17:05:11 picard kernel:  I/O error: dev 08:00, sector 2785346179
Aug  1 17:05:11 picard kernel:  I/O error: dev 08:00, sector 2785608323

...and so on and so on.


Oh, don't know if this helps, but the lvm PE size is set to 32MB (which
I think is the default). I can't quite make this number do anything
significant with the gaps between the errors - I mean, there are exactly
128 x 32 in 4096, but I'm not sure that helps...

Paul.


On Fri, 2003-08-01 at 16:39, Eric Sandeen wrote:
> On Fri, 1 Aug 2003, Bogdan Costescu wrote:
> 
> > The numbers are not sequential, but they are monotonically increasing :-)
> > The difference between any 2 values is 8388608. Now if these are 512 byte 
> > sectors, this is exactly 4294967296 bytes which is 2^32...
> > 
> > This won't help you directly... but might give somebody some idea :-)
> 
> The maximum AG size is 4G, for a very large fliesystem.  mkfs.xfs writes
> allocation group headers at the start of each AG.
> 
> howver, if this was split into small pieces & mkfs'd, then the AGs should
> not be that large...  hm.
> 
> -Eric
> 
>